aboutsummaryrefslogtreecommitdiffstats
path: root/camel/providers/nntp/camel-nntp-summary.c
blob: d30fdc6267181ffb22e95d06206ddaaff8a8a17b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; fill-column: 160 -*- */
/*
 *  Copyright (C) 2000 Ximian Inc.
 *
 *  Authors: Michael Zucchi <notzed@ximian.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <ctype.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>

#include "camel/camel-file-utils.h"
#include "camel/camel-mime-message.h"
#include "camel/camel-stream-null.h"
#include "camel/camel-operation.h"
#include "camel/camel-data-cache.h"

#include "camel-nntp-summary.h"
#include "camel-nntp-folder.h"
#include "camel-nntp-store.h"
#include "camel-nntp-stream.h"

#define w(x)
#define io(x)
#define d(x) /*(printf("%s(%d): ", __FILE__, __LINE__),(x))*/
extern int camel_verbose_debug;
#define dd(x) (camel_verbose_debug?(x):0)

#define CAMEL_NNTP_SUMMARY_VERSION (1)

struct _CamelNNTPSummaryPrivate {
    char *uid;

    struct _xover_header *xover; /* xoverview format */
    int xover_setup;
};

#define _PRIVATE(o) (((CamelNNTPSummary *)(o))->priv)

static CamelMessageInfo * message_info_new (CamelFolderSummary *, struct _camel_header_raw *);
static int summary_header_load(CamelFolderSummary *, FILE *);
static int summary_header_save(CamelFolderSummary *, FILE *);

static void camel_nntp_summary_class_init (CamelNNTPSummaryClass *klass);
static void camel_nntp_summary_init       (CamelNNTPSummary *obj);
static void camel_nntp_summary_finalise   (CamelObject *obj);
static CamelFolderSummaryClass *camel_nntp_summary_parent;

CamelType
camel_nntp_summary_get_type(void)
{
    static CamelType type = CAMEL_INVALID_TYPE;
    
    if (type == CAMEL_INVALID_TYPE) {
        type = camel_type_register(camel_folder_summary_get_type(), "CamelNNTPSummary",
                       sizeof (CamelNNTPSummary),
                       sizeof (CamelNNTPSummaryClass),
                       (CamelObjectClassInitFunc) camel_nntp_summary_class_init,
                       NULL,
                       (CamelObjectInitFunc) camel_nntp_summary_init,
                       (CamelObjectFinalizeFunc) camel_nntp_summary_finalise);
    }
    
    return type;
}

static void
camel_nntp_summary_class_init(CamelNNTPSummaryClass *klass)
{
    CamelFolderSummaryClass *sklass = (CamelFolderSummaryClass *) klass;
    
    camel_nntp_summary_parent = CAMEL_FOLDER_SUMMARY_CLASS(camel_type_get_global_classfuncs(camel_folder_summary_get_type()));

    sklass->message_info_new  = message_info_new;
    sklass->summary_header_load = summary_header_load;
    sklass->summary_header_save = summary_header_save;
}

static void
camel_nntp_summary_init(CamelNNTPSummary *obj)
{
    struct _CamelNNTPSummaryPrivate *p;
    struct _CamelFolderSummary *s = (CamelFolderSummary *)obj;

    p = _PRIVATE(obj) = g_malloc0(sizeof(*p));

    /* subclasses need to set the right instance data sizes */
    s->message_info_size = sizeof(CamelMessageInfo);
    s->content_info_size = sizeof(CamelMessageContentInfo);

    /* and a unique file version */
    s->version += CAMEL_NNTP_SUMMARY_VERSION;
}

static void
camel_nntp_summary_finalise(CamelObject *obj)
{
    CamelNNTPSummary *cns = CAMEL_NNTP_SUMMARY(obj);

    g_free(cns->priv);
}

CamelNNTPSummary *
camel_nntp_summary_new(const char *path)
{
    CamelNNTPSummary *cns = (CamelNNTPSummary *)camel_object_new(camel_nntp_summary_get_type());

    camel_folder_summary_set_filename((CamelFolderSummary *)cns, path);
    camel_folder_summary_set_build_content((CamelFolderSummary *)cns, FALSE);
    
    return cns;
}

static CamelMessageInfo *
message_info_new(CamelFolderSummary *s, struct _camel_header_raw *h)
{
    CamelMessageInfo *mi;
    CamelNNTPSummary *cns = (CamelNNTPSummary *)s;

    /* error to call without this setup */
    if (cns->priv->uid == NULL)
        return NULL;

    /* we shouldn't be here if we already have this uid */
    g_assert(camel_folder_summary_uid(s, cns->priv->uid) == NULL);

    mi = ((CamelFolderSummaryClass *)camel_nntp_summary_parent)->message_info_new(s, h);
    if (mi) {
        camel_message_info_set_uid(mi, cns->priv->uid);
        cns->priv->uid = NULL;
    }
    
    return mi;
}

static int
summary_header_load(CamelFolderSummary *s, FILE *in)
{
    CamelNNTPSummary *cns = CAMEL_NNTP_SUMMARY(s);

    if (((CamelFolderSummaryClass *)camel_nntp_summary_parent)->summary_header_load(s, in) == -1)
        return -1;

    /* Legacy version */
    if (s->version == 0x20c) {
        camel_file_util_decode_fixed_int32(in, &cns->high);
        return camel_file_util_decode_fixed_int32(in, &cns->low);
    }

    if (camel_file_util_decode_fixed_int32(in, &cns->version) == -1)
        return -1;

    if (cns->version > CAMEL_NNTP_SUMMARY_VERSION) {
        g_warning("Unknown NNTP summary version");
        errno = EINVAL;
        return -1;
    }

    if (camel_file_util_decode_fixed_int32(in, &cns->high) == -1
        || camel_file_util_decode_fixed_int32(in, &cns->low) == -1)
        return -1;

    return 0;
}

static int
summary_header_save(CamelFolderSummary *s, FILE *out)
{
    CamelNNTPSummary *cns = CAMEL_NNTP_SUMMARY(s);

    if (((CamelFolderSummaryClass *)camel_nntp_summary_parent)->summary_header_save(s, out) == -1
        || camel_file_util_encode_fixed_int32(out, CAMEL_NNTP_SUMMARY_VERSION) == -1
        || camel_file_util_encode_fixed_int32(out, cns->high) == -1
        || camel_file_util_encode_fixed_int32(out, cns->low) == -1)
        return -1;

    return 0;
}

/* ********************************************************************** */

/* Note: This will be called from camel_nntp_command, so only use camel_nntp_raw_command */
static int
add_range_xover(CamelNNTPSummary *cns, CamelNNTPStore *store, unsigned int high, unsigned int low, CamelFolderChangeInfo *changes, CamelException *ex)
{
    CamelFolderSummary *s;
    CamelMessageInfo *mi;
    struct _camel_header_raw *headers = NULL;
    char *line, *tab;
    int len, ret;
    unsigned int n, count, total, size;
    struct _xover_header *xover;

    s = (CamelFolderSummary *)cns;

    camel_operation_start(NULL, _("%s: Scanning new messages"), ((CamelService *)store)->url->host);

    ret = camel_nntp_raw_command(store, ex, &line, "xover %r", low, high);
    if (ret != 224) {
        camel_operation_end(NULL);
        if (ret != -1)
            camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
                         _("Unexpected server response from xover: %s"), line);
        return -1;
    }

    count = 0;
    total = high-low+1;
    while ((ret = camel_nntp_stream_line(store->stream, (unsigned char **)&line, &len)) > 0) {
        camel_operation_progress(NULL, (count * 100) / total);
        count++;
        n = strtoul(line, &tab, 10);
        if (*tab != '\t')
            continue;
        tab++;
        xover = store->xover;
        size = 0;
        for (;tab[0] && xover;xover = xover->next) {
            line = tab;
            tab = strchr(line, '\t');
            if (tab)
                *tab++ = 0;
            else
                tab = line+strlen(line);

            /* do we care about this column? */
            if (xover->name) {
                line += xover->skip;
                if (line < tab) {
                    camel_header_raw_append(&headers, xover->name, line, -1);
                    switch(xover->type) {
                    case XOVER_STRING:
                        break;
                    case XOVER_MSGID:
                        cns->priv->uid = g_strdup_printf("%u,%s", n, line);
                        break;
                    case XOVER_SIZE:
                        size = strtoul(line, NULL, 10);
                        break;
                    }
                }
            }
        }

        /* skip headers we don't care about, incase the server doesn't actually send some it said it would. */
        while (xover && xover->name == NULL)
            xover = xover->next;

        /* truncated line? ignore? */
        if (xover == NULL) {
            mi = camel_folder_summary_uid(s, cns->priv->uid);
            if (mi == NULL) {
                mi = camel_folder_summary_add_from_header(s, headers);
                if (mi) {
                    mi->size = size;
                    cns->high = n;
                    camel_folder_change_info_add_uid(changes, camel_message_info_uid(mi));
                }
            } else {
                camel_folder_summary_info_free(s, mi);
            }
        }

        if (cns->priv->uid) {
            g_free(cns->priv->uid);
            cns->priv->uid = NULL;
        }

        camel_header_raw_clear(&headers);
    }

    camel_operation_end(NULL);

    return ret;
}

/* Note: This will be called from camel_nntp_command, so only use camel_nntp_raw_command */
static int
add_range_head(CamelNNTPSummary *cns, CamelNNTPStore *store, unsigned int high, unsigned int low, CamelFolderChangeInfo *changes, CamelException *ex)
{
    CamelFolderSummary *s;
    int i, ret = -1;
    char *line, *msgid;
    unsigned int n, count, total;
    CamelMessageInfo *mi;
    CamelMimeParser *mp;

    s = (CamelFolderSummary *)cns;

    mp = camel_mime_parser_new();

    camel_operation_start(NULL, _("%s: Scanning new messages"), ((CamelService *)store)->url->host);

    count = 0;
    total = high-low+1;
    for (i=low;i<high+1;i++) {
        camel_operation_progress(NULL, (count * 100) / total);
        count++;
        ret = camel_nntp_raw_command(store, ex, &line, "head %u", i);
        /* unknown article, ignore */
        if (ret == 423)
            continue;
        else if (ret == -1)
            goto ioerror;
        else if (ret != 221) {
            camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM, _("Unexpected server response from head: %s"), line);
            goto ioerror;
        }
        line += 3;
        n = strtoul(line, &line, 10);
        if (n != i)
            g_warning("retrieved message '%d' when i expected '%d'?\n", n, i);
        
        /* FIXME: use camel-mime-utils.c function for parsing msgid? */
        if ((msgid = strchr(line, '<')) && (line = strchr(msgid+1, '>'))){
            line[1] = 0;
            cns->priv->uid = g_strdup_printf("%u,%s\n", n, msgid);
            mi = camel_folder_summary_uid(s, cns->priv->uid);
            if (mi == NULL) {
                if (camel_mime_parser_init_with_stream(mp, (CamelStream *)store->stream) == -1)
                    goto error;
                mi = camel_folder_summary_add_from_parser(s, mp);
                while (camel_mime_parser_step(mp, NULL, NULL) != CAMEL_MIME_PARSER_STATE_EOF)
                    ;
                if (mi == NULL) {
                    goto error;
                }
                cns->high = i;
                camel_folder_change_info_add_uid(changes, camel_message_info_uid(mi));
            } else {
                /* already have, ignore */
                camel_folder_summary_info_free(s, mi);
            }
            if (cns->priv->uid) {
                g_free(cns->priv->uid);
                cns->priv->uid = NULL;
            }
        }
    }

    ret = 0;
error:

    if (ret == -1) {
        if (errno == EINTR)
            camel_exception_setv(ex, CAMEL_EXCEPTION_USER_CANCEL, _("Use cancel"));
        else
            camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM, _("Operation failed: %s"), strerror(errno));
    }
ioerror:

    if (cns->priv->uid) {
        g_free(cns->priv->uid);
        cns->priv->uid = NULL;
    }
    camel_object_unref((CamelObject *)mp);

    camel_operation_end(NULL);

    return ret;
}

/* Assumes we have the stream */
/* Note: This will be called from camel_nntp_command, so only use camel_nntp_raw_command */
int
camel_nntp_summary_check(CamelNNTPSummary *cns, CamelNNTPStore *store, char *line, CamelFolderChangeInfo *changes, CamelException *ex)
{
    CamelFolderSummary *s;
    int ret = 0, i;
    unsigned int n, f, l;
    int count;
    char *folder = NULL;
    CamelNNTPStoreInfo *si;

    s = (CamelFolderSummary *)cns;

    line +=3;
    n = strtoul(line, &line, 10);
    f = strtoul(line, &line, 10);
    l = strtoul(line, &line, 10);
    if (line[0] == ' ') {
        char *tmp;

        folder = line+1;
        tmp = strchr(folder, ' ');
        if (tmp)
            *tmp = 0;
        tmp = g_alloca(strlen(folder)+1);
        strcpy(tmp, folder);
        folder = tmp;
    }

    if (cns->low == f && cns->high == l) {
        dd(printf("nntp_summary: no work to do!\n"));
        goto update;
    }

    /* Need to work out what to do with our messages */

    /* Check for messages no longer on the server */
    if (cns->low != f) {
        count = camel_folder_summary_count(s);
        for (i = 0; i < count; i++) {
            CamelMessageInfo *mi = camel_folder_summary_index(s, i);

            if (mi) {
                const char *uid = camel_message_info_uid(mi);
                const char *msgid;

                n = strtoul(uid, NULL, 10);
                if (n < f || n > l) {
                    dd(printf("nntp_summary: %u is lower/higher than lowest/highest article, removed\n", n));
                    /* Since we use a global cache this could prematurely remove
                       a cached message that might be in another folder - not that important as
                       it is a true cache */
                    msgid = strchr(uid, ',');
                    if (msgid)
                        camel_data_cache_remove(store->cache, "cache", msgid+1, NULL);
                    camel_folder_change_info_remove_uid(changes, uid);
                    camel_folder_summary_remove(s, mi);
                    count--;
                    i--;
                }
                
                camel_folder_summary_info_free(s, mi);
            }
        }
        cns->low = f;
    }

    if (cns->high < l) {
        if (cns->high < f)
            cns->high = f-1;

        if (store->xover) {
            ret = add_range_xover(cns, store, l, cns->high+1, changes, ex);
        } else {
            ret = add_range_head(cns, store, l, cns->high+1, changes, ex);
        }
    }

    /* TODO: not from here */
    camel_folder_summary_touch(s);
    camel_folder_summary_save(s);
update:
    /* update store summary if we have it */
    if (folder
        && (si = (CamelNNTPStoreInfo *)camel_store_summary_path((CamelStoreSummary *)store->summary, folder))) {
        int unread = 0;

        count = camel_folder_summary_count(s);
        for (i = 0; i < count; i++) {
            CamelMessageInfo *mi = camel_folder_summary_index(s, i);

            if (mi) {
                if ((mi->flags & CAMEL_MESSAGE_SEEN) == 0)
                    unread++;
                camel_folder_summary_info_free(s, mi);
            }
        }
        
        if (si->info.unread != unread
            || si->info.total != count
            || si->first != f
            || si->last != l) {
            si->info.unread = unread;
            si->info.total = count;
            si->first = f;
            si->last = l;
            camel_store_summary_touch((CamelStoreSummary *)store->summary);
            camel_store_summary_save((CamelStoreSummary *)store->summary);
        }
        camel_store_summary_info_free ((CamelStoreSummary *)store->summary, (CamelStoreInfo *)si);
    } else {
        if (folder)
            g_warning("Group '%s' not present in summary", folder);
        else
            g_warning("Missing group from group response");
    }

    return ret;
}